Edwin j



(N0 Modem E. J. ARMSTRONG;

GOVERNOR FOR STEAM ENGINES. I I No. 370,303. Patented Sept. 20, 188

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, EDWIN J. ARMSTRONG, OF PAINTED POST, NEW YORK, ASSIGNOR TO THE WESTON ENGINE COMPANY, OF SAME PLACE.

SPECIFICATION forming part of Letters Patent No. 370,303, dated September 20, 1887.

I Application riled April 30, 1887. Serial No. 236,682. (No model.)

T all whom it may a w rn: of arm e rests when the governor is not in Beit known that I, EDWIN J. ARMSTRONG, operation. The projection G shown in this a citizen of the United States, residing at instance is the balancing-plate, drawn to a Painted Post, inthe county of Steuben and point for the purpose named.

State of New York, haveinvented certain new K is a flat spring having one end rigidly seaud useful Improvements in Fly-WVheel Govcured to the rim of the wheel and its other end ernors for SteanrEngines'; and I do hereby suitably attached to a pin projecting from the declare the following to be a full, clear, and lower end of the eccentric. exact description of the invention, suchas On the lever O a projection, g, is formed,o'o

will enable others skilled in the art to which from which a crescent-shaped lateral projecit appertains to make and use the same. tion, H,,springs, which, when the lever is at This invention relates to fly-wheel governrest, is concentric with the pin a. This pin ors for steam-engines; and it has forits object is secured in the end of the eccentric B and to provide simple and durable means whereby projects laterally therefrom, as plainly shown 6 i5 the governing mechanism may be regulated or in 3. A'circumferential groove is formed adjusted to a nicety, and thus attain and pre in the pin, and a rod or bar, L, has its bearserve the degree of isochronism desired by the ing in said groove, the end of the rod being engineer, or which the nature of the work concaved to fit snugly in the groove between may require; and it consists in an adjustable its flanges or sides, so that said rod cannot 70 2oconnecting link and bar interposed between work sidewise. The other end of this rod L the weight-lever and a laterally-movable ecis rounded or formed on the arc of a circle and centric, substantially as hereinafterdescribed flattened on its sides, and is provided with and claimed. side flanges, h, which fit closely on both sides In the accompanying drawings, forming a of the smaller end of a link, M, whose larger 7 part of this specification, Figure l is a side end surrounds the crescent-shaped projection elevation of a fly-wheel governor embodying H on the projecting lug g of the lever O. The

my invention; Fig. 2, a detail view of the link and the projection H have a common cenweight-lever, showing the pin a in section, the ter, or are concentric when at rest, and as the section being taken on the line Y Y, Fig. 3; two bearing-points-that is, the outer side of 80 Fig. 3, a detail section on the line 00 as, Fig. 1; the crescent-shaped projection and the inner and Fig. 4, a detail section of a modification side of the large end of the link-form'a part of my device. of the same circle it follows that the link may Similarletters refer to similar parts throughbe turned on the projection as on a pivot. The

out the several views. small end of the link has a suitable eye, which 8 5 A represents a lily-wheel of any ordinary is pivoted to one end of an adjusting bolt or or desired construction, to a projection on rod, N, said rod passing through a lug, O,

which or to a spoke of the same the eccentric rigidly secured to the lever O, and having B is pivotally secured, so that it may have a nuts on each side of the lug and running on free lateral movement across the main shaft of the rod N, to adjust said rod and hold it in its 0 0 the engine. adjusted position.

0 is a lever suitably pivoted to the wheel, In operation the lever O, which transmits and havingtwo oppositely-projecting arms,bc, the centrifugal force of the weights to overthe former of which carries a weight, D, at its come the centripetal force of the spring, transouter end, and the end of the other arm, 0, fers the strain to the link, and thence through 5 5 rests on the point or tip of an arm, 6, of a the bar L to the eccentric to which the spring doublearmed lever, E, the other arm, f, of is attached, and the eccentric is thus moved which projectsin an opposite direction to arm across the crank-shaft.

e and carries a weight, F. Both of these It is evident that when the governor is at weights are rigidly secured to or cast with the rest, the crescent-shaped projection and pin a too arms. From therim of the wheelaprojection, being concentric with each other, the link G, extendsinwardly, on which the end or point may be moved through an are without trans ferrlng any movement to the eccentric. Consequently the position of the link will make no difference in the centrifugal force required to start the eccentric in its movement across the shaft; but as the weights move outwardly and the eccentric and lever take a different position the crescent-shaped projection and the pin will no longer be concentric with each other, and in this position-that is, eccentric to each other-a movement of the link will change the leverage which the weights have over the spring. This change of leverage, though slight, is sufiicieut to change the closeness of the govern0r?s action to a very consid erable extent, and is a very desirable feature in an engine requiring close regulation, as the engineer is enabled thereby to set it to govern as closely as he may see fit.

The means for regulating or adjusting the link, as shown in Figs. 1, 2, and 3, are very simple, and is a preferred form; but it is evident that any means other than that described for pivotally holding and adjusting the link may be employed with good result, and I do not desire to be limited to this exact construction.-

In Fig. 4 I show a modified form ofthe regulating device, being on a section on the same line as Fig. 3, in which I employ two bars or rods, L L, the former of which takes the It is evident from the foregoing that the operation of this device will be the same as that of the first-described device.

Having thus described my invention,what I claim as new, and desire to secure, by Letters Patent, is

1. In an automatic fly-wheel governor, a regulating device interposed between the weight-lever and the movable eccentric, and consisting of a bar or rod pivotally connected to the eccentric and pivotally connected with means for moving said rod in the arc of a circle, having its axis coincident with the axis of the pivotal point on which said rod presses or has its bearing, substantially as set forth.

2. In a fly-wheel governor, aregulating device interposed between the weight-lever and the movable eccentric, consisting of a rod or bar pivotally connected with the eccentric and with a bar or link pivotally connected to the weight-lever, and having its bearing normally concentric with the pivot supporting the first-named rod, and means for adjusting the link in the arc of a circle,substantially as described.

3. In a fly-wheel governor, a regulating device interposed between the weight-lever and the movable eccentric, consisting of a link pivotally connected with the weight-lever and with a bar, said bar being pivotally connected with the eccentric, an adj usting-rod pivotal] y connected to said link, and means for holding said rod in its adjusted position, substantially as set forth.

In testimony whereof I affix my signature in presence of two witnesses.

EDWIN J. ARMSTRONG.

Witnesses:

PHILIP MAURO, O. J. HEDRIOK. 

